Burglar-alarm.



Patented Nov. 7, i899.

J. T. RUWLEY J. R. CAVANAGH.

BURGLAR ALARM.

(Application led May 21, 1898.)

(No Modal.)

UNITED STATES PATENT EETCE.

JOHN T. ROWLEY, OF BEAVER FALLS, AND JOHN R. CAVANAGI-I, OF PITTSBURG,PENNSYLVANIA.

BU RG LAR-ALARM.

SPECIFICATION forming part of Letters Patent No. 636,292, datedNovember` 7, 1899.

I Application led May 21,1898. Serial No. 681,357. (No model.)

To all whom it may concern:

Be it known that We, JOHN T. ROWLEY, residing at Beaver' Falls, in thecounty of Beaver, and JOHN R. CAVANAGH, residing at Pittsburg, in thecounty of Allegheny, State of Pennsy1vania,citizens of the UnitedStates, have invented certain new and useful Improvements inBurglar-Alarms; and we do hereby declare the following to bea full,clear, and exact description thereof, reference being had to theaccompanying drawings, which form a part of this specification, inwhich- Figure 1 indicates a plan view ofour improved burglar-alarm. Fig.2 is a front elevation of the same. Fig. 3isa side elevation of thesame, dotted lines indicating finger in position at discharge ofcartridge. Fig. 4 is a View of door-plate. Fig. 5 is a side elevation ofalarm as attached to window-sash. Fig. 6 is a view of window-sash plate.

Our invention relates to devices adapted to be fastened and adjustedupon doors, windows, the., for the purpose of giving an alarm when anattempt is made to open said door or window while the alarm isoperatively affixed thereto; and to this purpose our invention consistsof the novel construction and arrangement of parts hereinafterdescribed, reference being had to the accompanying drawings, which forma part of this specification, in which like reference charactersindicatelike parts wherever they occur.

Referring now to 'said drawings, 1 is a box or case adapted to bescrewed or otherwise suitably secured to the side of a door, adjacent tothe frame or jamb thereof or upon the window-sash. The said box isprovided with` a slot 2 intermediate its length, transversely the same,for the purpose hereinafter specified and with a slot 3 in the forwardend thereof, longitudinally thereof, extending from the transverse slotto the upwardly-projecting abutment or part 4 at the extreme forward endof the case,said u pwardly-proj ecting abutment being provided with anorifice 5 for the reception of a cartridge or cap 6. The said box orcase is provided with openings 7 7 at either end thereof,in which theends of the bolt 8 project, the said bolt being provided with anoutwardly-projecting nger 9, which is adapted to project in said slots 2and 3. Said bolt is also provided on its lower side, directly oppositesaid finger, with a short projection or notch lO, between which and therear end of the box is loosely mounted on said bolt a coilspring l1. Theforward end of said finger is provided with a projection or pin l2,adapted when said finger is forced forward by the retraction of saidspring to explode the cartridge or cap secured in said opening. A plate13, secured to the jamb or frame of the window in any suitable manner,is adapted to maintain the spring compressed when the finger is adjustedin operative position and is provided with an opening 14, into which theforward end of the bolt is adapted to pass when the door is forced open,thus permitting the bolt to travel a sufficient distance to bring thengerin contact with the cap or cartridge, exploding the same and at thesame time bolting the door.

When at any time it is desirable not to set l the alarm, the bolt isdrawn rearwardly sufficient to permit the finger to be thrown eitherupwardly or downwardly in the slot, where the bolt is held out ofcontact with the plate on the door-frame and rearwardly of the edge ofthe door when the saine is open, permitting the same to fully open andshut without interfering with the alarm. When the door is closed atnight, the finger is thrown into alinement with the slot and cartridge.An effort to open the door when the alarm is so adjusted will operate todischarge the cap or cartridge, as heretofore specified.

Having described our invention, what we claim, and desire to secure byLetters Patent, 1s-

In a burglar-alarm, a case havinga vertical slot intermediate the sameand alongitudinal slot extending from said vertical slot toward thefront of the casing, an upwardly-projecting abutment having an. orificeadapted to receive a cap or cartridge the said orifice being inalinement with said longitudinal slot, a bolt mounted in said oasehaving a spring mounted thereon between a notch in the lower sidethereof and the rear end of the case and having an outwardly-projectingfinger integral therewith adapted to project in the slots IOO in saidcase and to engage in the vertical slot xed our signatures in thepresence of two and when said spring is retracted to strike subscribingwitnesses. said cap or cartridge, in combination with e JOHN T. ROWLEY.perforated plate adapted to be fixed to the JOHN R. CAVANAGH. 5 jamb ofadool1 Yor a Window-frame, substan- Witnesses:

` C. A. WILLIAMS,

tally as set forth.

WM. A. WAY.

In testimony whereof We have hereunto af-

